A dam broke in canyon country above Los Angeles in the 1920’s and destroyed towns all the way to the sea. The destruction is amazing.
Part of the reason Egypt no longer antagonize Israel since the Azwan dam was built. One bunker buster in the face of the dam, no Egypt.
The Azwan High dam was built from earth and rock.
130 feet across (thick) the top.
An old rule of thumb, one pound of H.E.,to move one pound of earth.
And that requires proper placement.
Going to take a bit more than a ‘daisy cutter’.
That would be the Mulholland Dam. And everyone is familiar with the South Fork Dam that collapsed and caused the historic Johnstown Flood.
Pieces of the Mulholland Dam are still visible in the flood path, and the South Fork Dam is still standing ... less a large section from its middle.